When a house is on fire badly enough to require the fire brigade, it's probably a write-off anyway. Even if the fire is put out promptly, the smoke and water damage will mean every room will need full remodelling, and the roof probably needs replacing. At that point, the cost isn't so different to just knocking it down and building again.

The main benefit the fire brigade offers is the ability to prevent spread to other buildings, and assist people escaping.